View source for Poa laxa

{{Treatment/ID
|accepted_name=Poa laxa
|accepted_authority=
|publications=
|basionyms=
|synonyms=
|hierarchy=Poaceae;Poaceae subfam. Pooideae;Poaceae tribe Poeae;Poa;Poa subg. Poa;Poa sect. Oreinos;Poa laxa
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Poaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Poaceae subfam. Pooideae]]</div><div class="higher-taxon"><small>tribe</small>[[Poaceae tribe Poeae]]</div><div class="higher-taxon"><small>genus</small>[[Poa]]</div><div class="higher-taxon"><small>subgenus</small>[[Poa subg. Poa]]</div><div class="higher-taxon"><small>section</small>[[Poa sect. Oreinos]]</div><div class="higher-taxon"><small>species</small>[[Poa laxa]]</div></div>
|volume=Volume 24
|mention_page=
|treatment_page=page 572
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>perennial; not or only slightly glaucous; densely tufted, not stoloniferous, not rhizomatous. <b>Basal</b> branching mixed intra- and extra vaginal. <b>Culms</b> 6-18 cm, with 0(1) exserted nodes, upper node in the lower 1/3 of the culms. <b>Sheaths</b> closed for 1/10 – 1/5 their length, terete, smooth or very sparsely scabrous, distal sheath lengths 0.8-1.8 times blade lengths; ligules 1.25-2.5 mm, smooth, apices obtuse, often lacerate; blades thin, sparsely scabrous adaxially, flag leaf blades 1.6-3.8 cm. <b>Panicles</b> 1.5-3.5 cm, slightly lax, ovoid, contracted to loosely contracted, dense to moderately dense, with 2-6 branches per node; branches steeply ascending, fairly straight, sulcate or angled, smooth or infrequently the angles sparsely scabrous, not glaucous. <b>Spikelets</b> laterally compressed; florets 2-5; rachilla internodes smooth, glabrous, lower internodes 0.8-1 mm. <b>Glumes</b> equal, broadly lanceolate, thin; lower glumes 0.75-1.05 mm wide, 3-veined; upper glumes 3.7-4.7 mm long, 0.9-1.3 mm wide, lengths 3.7-4.1 times widths; calluses all glabrous, or some proximal florets within a spikelet sparsely webbed; lemmas 3.7-4.5 mm, broadly lanceolate, distinctly keeled, thin, keels and marginal veins short- to long-villous, hairs extending 1/3-1/2 the keel length, lateral veins usually glabrous, or infrequently sparsely softly puberulent, intercostal regions glabrous; palea keels finely scabrous; anthers 0.8-1.2 mm, poorly formed, sacs not fully maturing, not dehiscing, about 0.1 mm in diameter. <b>2n</b> = ca. 65, 70.</span><!--

-->{{Treatment/Body
|discussion=<p><i>Poa laxa</i> × glauca is an eastern low arctic entity which has passed under the name <i>P. flexuosa</i> Sm., <i>P. laxa</i> subsp. flexuosa (Sm.) Hyl., and, more recently, P. laxiuscula (Blytt) Lange. It has also been confused with <i>P. glauca</i> (p. 576). It can be distinguished from <i>P. laxa</i> (see previous) by its more open sheaths and poorly developed, indehiscent anthers. It differs from <i>P. glauca</i> in its broad, thin glumes and lemmas; compact panicles; smooth or nearly smooth, non-glaucous branches; and poorly developed, indehiscent anthers. It also grows in wetter habitats than <i>P. glauca</i>, often around seeps. Its chloroplast DNA is more like that of the American <i>P. laxa </i>subsp.<i> fernaldiana</i> than that of the European subspp. flexuosa and laxa or of <i>P. glauca</i>.</p>
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-->{{#Taxon:
name=Poa laxa
|authority=
|rank=species
|parent rank=section
|synonyms=
|basionyms=
|family=Poaceae
|reference=None
|publication title=
|publication year=
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/200273ad09963decb8fc72550212de541d86569d/coarse_grained_fna_xml/V24/V24_799.xml
|subfamily=Poaceae subfam. Pooideae
|tribe=Poaceae tribe Poeae
|genus=Poa
|subgenus=Poa subg. Poa
|section=Poa sect. Oreinos
|species=Poa laxa
}}<!--

-->[[Category:Treatment]][[Category:Poa sect. Oreinos]]